JavaScript and Its Industry Use Cases::::

JavaScript, often abbreviated as JS, is a programming language that conforms to the ECMAScript specification. JavaScript is high-level, often just-in-time compiled, and multi-paradigm. It has curly-bracket syntax, dynamic typing, prototype-based object-orientation, and first-class functions.JS is designed by Netscape, Brendan Eich. JavaScript is a one of the most dynamic programming language that’s used for web development, in web applications, for game development, and lots more. It allows you to implement dynamic features on web pages that cannot be done with only HTML and CSS.

What is JavaScript used for?

1. Adding interactive behavior to web pages

JavaScript allows users to interact with web pages. There are almost no limits to the things you can do with JavaScript on a web page — these are just a few examples:

• Show or hide more information with the click of a button
• Change the color of a button when the mouse hovers over it
• Slide through a carousel of images on the homepage
• Zooming in or zooming out on an image
• Displaying a timer or count-down on a website
• Playing audio and video in a web page
• Displaying animations
• Using a drop-down hamburger menu

2. Creating web and mobile apps

Developers can use various JavaScript frameworks for developing and building web and mobile apps. JavaScript frameworks are collections of JavaScript code libraries that provide developers with pre-written code to use for routine programming features and tasks — literally a framework to build websites or web applications around.

Popular JavaScript front-end frameworks include React, React Native, Angular, and Vue. Many companies use Node.js, a JavaScript runtime environment built on Google Chrome’s JavaScript V8 engine. A few famous examples include Paypal, LinkedIn, Netflix, and Uber!

3. Building web servers and developing server applications

Beyond websites and apps, developers can also use JavaScript to build simple web servers and develop the back-end infrastructure using Node.js.

4. Game development

Of course, you can also use JavaScript to create browser games. These are a great way for beginning developers to practice their JavaScript skills.

Best JavaScript Frameworks to Use in 2021:::

What is JavaScript Framework, and Why Use One?

A software framework is an abstraction in which software providing generic functionality can be selectively changed by additional user-written code. JavaScript framework is an application framework written in JavaScript where the programmers can manipulate the functions and use them for their convenience.

Frameworks are more adaptable for the designing of websites, and hence, most website developers prefer them. JavaScript frameworks are a type of tool that makes working with JavaScript easier and smoother. These frameworks also make it possible for the programmer to code the application as a device responsive. This responsiveness is yet another reason why the JavaScript frameworks are quite popular when it comes to the question of using a high-level machine language. Let’s have a look at the best JS Frameworks in 2021.

10 Top JavaScript Frameworks

1. Angular

One of the most powerful, efficient, and open-source JavaScript frameworks is Angular. Google operates this framework and is implemented to use for developing a Single Page Application (SPA). It extends the HTML into the application and interprets the attributes to perform data binding.

Features

Cross-Platform

• Progressive Web Apps: Modern web platform capabilities to deliver app-like experiences that are high performance, offline, and zero-step installation.
• Native: Strategies from Cordova, Ionic, or NativeScript are used to build the native app.
• Desktop: Desktop-installed apps across Mac, Windows, and Linux can be created using the same Angular methods like the web plus the ability to access native OS APIs.

Speed and Performance

• Code Generation: Angular turns templates into code that’s highly optimized for JavaScript virtual machines, giving hand-written code benefits.
• Universal: Serve the first view of Node.js, .NET, PHP, and other servers for near-instant rendering in just HTML and CSS.
• Code Splitting: With the new Component Router, angular apps load quickly, delivering automatic code-splitting. So users load the code required to render the view they request.

Productivity

• Templates: Create UI views with simple and powerful template syntax.
• Angular CLI: Command line tools: start building fast, add components and tests, then instantly deploy.
• IDEs: Get intelligent code completion, instant errors, and other feedback in popular editors and IDEs.

Full Development Story

• Testing: Protractor makes your scenario tests run faster and in a stable manner.
• Animation: Create high-performance, complex choreographies, and animation timelines with very little code through Angular’s intuitive API.
• Accessibility: Create accessible applications with ARIA-enabled components, developer guides, and built-in a11y test infrastructure.

2. React

Created by Facebook, the React framework has earned popularity within a short period. It is used to develop and operate the dynamic User Interface of the web pages with high incoming traffic. It makes the use of a virtual DOM, and hence, the integration of the same with any application is more straightforward.

Features

• Declarative: Creates interactive and dynamic UI for websites and mobile applications. React updates efficiently and render the right components when data changes. Declarative views make the code readable and easy to debug.
• Virtual DOM: For every DOM object, there is a corresponding “virtual DOM object.” It creates a virtual copy of the original DOM and is a representation of a DOM object,
• Event handling: React has its fully compatible W3C object model event system created. It also provides a cross-browser interface to a native event, meaning no need to worry about incompatible event names and fields. React reduces memory head by as event system is implemented through event delegation and has a pool of event objects.
• JSX: JSX is a markup syntax that closely resembles HTML. JSX makes writing React components easier by making the syntax almost identical to the HTML injected into the web page.
• Performance: React uses one-way data binding with an application architecture called Flux controls. ReactJS helps update the View for the user and, Flux controls the application workflow. Virtual DOM adds advantages as it compares the new data with original DOM and updates the View automatically.
• React Native: React Native is a custom renderer for React; it uses native components instead of web components like React as building blocks. It also serves access to these platforms’ features, apart from transforming React code to work on iOS and Android.
• Component-Based: In React, everything is a component of the web page divided into small components to create a view(or UIs). Every part of the application visuals would be wrapped inside a self-contained module known as a component. Components in ReactJS use to define the visuals and interactions in applications.

3. Vue.js

Though developed in the year 2016, this JavaScript framework has already made its way into the market and has proven its worth by offering various features. Its dual integration mode is one of the most attractive features for creating high-end SPA or Single Page Application. It is a much reliable platform for developing cross-platform.

Features

• Virtual DOM: Vue.js utilizes virtual DOM. Virtual DOM is a clone of the principal DOM element. The virtual DOM absorbs every change intended for the DOM presents in the form of JavaScript data structures, which are compared with the original data structure.
• The viewers view final changes that reflect in the real DOM. The method is creative and cost-effective; also, the changes are done quickly.
• Data Binding: This feature facilitates to manipulate or assign values to HTML attributes., change the style, assign classes with v-bind available, which is a binding directive.
• CSS Transitions and Animations: This feature provides several methods to apply a transition to HTML elements when added, updated, or removed from the DOM. Its features consist of a built-in component that wraps the element responsible for returning the transition effect.
• Template: It provides HTML-based templates that bind the DOM with the Vue.js instance data. The templates are compiled into Virtual DOM Render functions. A developer can use the render functions template and can replace the template with the render function.
• Methods: We use methods when an event occurs that isn’t necessarily related to the instance data being mutated or want to change a component’s state. Methods do not keep records of any dependencies but can take arguments.
• Complexity: Vue.js is simpler in terms of API and design. A web developer builds simple applications in a single day.

4. Ember.js

The introduction of Ember.js to the software market was 2015, and since then, it has gained popularity with its wide application area. The features of Ember.js support two-way data binding and hence, establish a reliable platform for handling the complicated User Interfaces. Popular websites like LinkedIn, Netflix, Nordstrom, and many more use the Ember.JS platform for their websites.

• Creation of usable and comfortable to maintain JavaScript web applications.
• It offers HTML and CSS of the development model at the core.
• Provides instance initializers.
• Ember.js offers routes that are the core features used for managing the URL.
• Ember.js provides the Ember Inspector tool for debugging Ember applications.
• Ember.js uses templates that help to automatically update the model if the content of applications gets changed.

5. Meteor

Meteor’s application area (aka Meteor.js or MeteorJS) serves the name itself since it is varied as it covers almost the significant portion of the software development. Uses of this framework include significant areas like back-end development, management of the database, business logic, and rendering of the front-end.

Full-Stack Solution

Meteor proves to be a full-stack solution for developing and deploying web applications.

The framework offers several built-in features, such as automatic CSS, reactive templates, and JS minification on the production server.

Galaxy, its cloud platform, is powerful for deploying, scaling, and monitoring client applications.

It is also bundled with useful client-side technologies, including templates, helpers, and events.

Development Ecosystem

Meteor.js is not just a JavaScript development framework, but an open-source Isomorphic Development Ecosystem (IDevE). It facilitates building real-time web applications from scratch as it contains all the necessary front-end and back-end components. Thus, it aids the developers through the entire app development lifecycle, right from setup and development to deployment.

Isomorphic JavaScript Code

The same code can be used on the front-end, the back-end, and mobile and web applications. It saves developers from requiring to install and configure different module managers, libraries, drivers, APIs, and more.

With Meteor, developers can leverage JavaScript’s power while reducing code length and complexity, saving a lot of production time of developers to perform context switching between server language and JavaScript.

Front-end Solution

Meteor offers a front-end development framework, Blaze.js, which offers some useful features. It also integrates with popular modern front-end frameworks like Backbone.js to yield better results.

Meteor offers isomorphic APIs that help in communication between front-end and back-end, allowing developers to handle client-server management and server-session management.

Data communication between client and server is automatic in this framework and does not require to write any boilerplate code.

Database Integration

Meteor.js supports only MongoDB as of now, and that is the biggest disadvantage. So, one can not use Meteor if they need to include NoSQL database support for your applications.

6. Mithril

Mithril is a client-side JavaScript framework that is used primarily in developing the Single Page Applications. As there are no derived functions from a base class, the framework’s implementation is more straightforward. It’s small (< 8kb gzip), fast and provides routing and XHR utilities out of the box. It has a few features similar to React.

Full-Stack Solution

• Meteor proves to be a full-stack solution for developing and deploying web applications.
• The framework offers several built-in features, such as automatic CSS, reactive templates, and JS minification on the production server.
• Galaxy, its cloud platform, is powerful for deploying, scaling, and monitoring client applications.
• It is also bundled with useful client-side technologies, including templates, helpers, and events.

Development Ecosystem

Meteor.js is not just a JavaScript development framework, but an open-source Isomorphic Development Ecosystem (IDevE). It facilitates building real-time web applications from scratch as it contains all the necessary front-end and back-end components. Thus, it aids the developers through the entire app development lifecycle, right from setup and development to deployment.

Isomorphic JavaScript Code

• The same code can be used on the front-end, the back-end, and mobile and web applications. It saves developers from requiring to install and configure different module managers, libraries, drivers, APIs, and more.
• With Meteor, developers can leverage JavaScript’s power while reducing code length and complexity, saving a lot of production time of developers to perform context switching between server language and JavaScript.

Front-end Solution

• Meteor offers a front-end development framework, Blaze.js, which offers some useful features. It also integrates with popular modern front-end frameworks like Backbone.js to yield better results.
• Meteor offers isomorphic APIs that help in communication between front-end and back-end, allowing developers to handle client-server management and server-session management.
• Data communication between client and server is automatic in this framework and does not require to write any boilerplate code.

Full-Stack Solution

• Meteor proves to be a full-stack solution for developing and deploying web applications.
• The framework offers several built-in features, such as automatic CSS, reactive templates, and JS minification on the production server.
• Galaxy, its cloud platform, is powerful for deploying, scaling, and monitoring client applications.
• It is also bundled with useful client-side technologies, including templates, helpers, and events.

Development Ecosystem

Meteor.js is not just a JavaScript development framework, but an open-source Isomorphic Development Ecosystem (IDevE). It facilitates building real-time web applications from scratch as it contains all the necessary front-end and back-end components. Thus, it aids the developers through the entire app development lifecycle, right from setup and development to deployment.

Isomorphic JavaScript Code

The same code can be used on the front-end, the back-end, and mobile and web applications. It saves developers from requiring to install and configure different module managers, libraries, drivers, APIs, and more.

With Meteor, developers can leverage JavaScript’s power while reducing code length and complexity, saving a lot of production time of developers to perform context switching between server language and JavaScript.

Front-end Solution

• Meteor offers a front-end development framework, Blaze.js, which offers some useful features. It also integrates with popular modern front-end frameworks like Backbone.js to yield better results.
• Meteor offers isomorphic APIs that help in communication between front-end and back-end, allowing developers to handle client-server management and server-session management.
• Data communication between client and server is automatic in this framework and does not require to write any boilerplate code.

Database Integration

Meteor.js supports only MongoDB as of now, and that is the biggest disadvantage. So, one can not use Meteor if they need to include NoSQL database support for your applications.

Database Integration

Meteor.js supports only MongoDB as of now, and that is the biggest disadvantage. So, one can not use Meteor if they need to include NoSQL database support for your applications.

7. Node.js

Node.js is a server-side JavaScript run-time environment, which works on cross platforms and is open-source. The framework is capable of driving asynchronous I/O with its event-driven architecture. It works in the JavaScript Runtime environment and shows JAVA’s similar properties like threading, packaging, o forming loops.

Features:

1. It is swift:

The library of Node.js is fast when it comes to code execution, as it is built on the V8 JavaScript engine of Google Chrome.

1. I/O is asynchronous and Event-Driven:

All the APIs are asynchronous, which means that its server does not wait for the API to come back with data. Here the server calls the APIs one by one and keeps moving to the next one while using a notification mechanism of Events to generate a response from the API, called previously. This makes it fast too.

1. Single-threaded:

Node.js, along with event looping, follows a single-threaded model.

1. Highly scalable:

Node.js follows an event mechanism that makes it possible for the server to respond in a non-blocking manner, which eventually makes it scalable.

1. No buffering:

When it comes to uploading audio and video files, Node.js cuts down the processing time significantly. It does not buffer any data, and here the application gets out the data in chunks.

1. Open source:

Being open-source, Node.js’s community has come up with several amazing models that can be used to add better capabilities to the Node.js applications.

1. License:

It has been released under MIT license.

8. Polymer

The polymer is an open-source JavaScript library developed by Google, which can create the website’s elements without going into a complex level. Also, it supports both one-way and two-way data binding, hence making a more extensive application area.

Features:

• Polymer.js is a JavaScript library built on top of the web-standard APIs that provides the simplest way to create custom HTML elements.
• It gives the polyfills for creating customized and reusable elements.
• It is used for the creation of reusable widgets in web documents and applications.
• It uses Google material design to develop mobile applications for fast and easy to development of mobile applications.
• The custom elements are distributed across the network and allow users to use these elements with the help of HTML Imports.

9. Aurelia

Aurelia framework is the latest version of JavaScript, which can be used to implement any interface. It is the next generation of the framework for developing far more robust websites. The framework of Aurelia can extend the HTML for various purposes, including data binding. Also, its modern architecture ensures that the purpose of toll is for interpretation client-side and server-side at a time.

Features:

• Components: Components are building blocks of the Aurelia framework and are composed of JavaScript view-model pairs and HTML views.
• Web Standards: It is one of the cleanest modern frameworks. It completely focuses on web standards without unnecessary abstractions.
• Extensible: The framework facilitates an easy way to integrate with the other needed tools.
• Commercial Support: This framework offers commercial and enterprise support.
• License: Aurelia is open-sourced and licensed under MIT license.

10. Backbone.js

It is one of the most popular JavaScript frameworks. It is effortless to understand and learn. It can be used to create Single Page Applications. The development of this framework involves the idea that all the server-side functions must flow through an API, which would help achieve complex functionalities by writing less code.

Features:

• BackboneJS uses JavaScript functions, making the development of applications and the frontend in a much easier.
• Building blocks such as models, views, events, routers, and collections are provided for assembling the client-side web applications.
• It is a simple library that helps in separating business and user interface logic.
• It is a free and open-source library and contains over 100 available extensions.
• It is a backbone for any project and helps in the organization of the code.
• BackboneJS has a soft dependency on jQuery and a hard dependency on Underscore.js.
• It allows us to create client-side web applications or mobile applications in a well-structured and organized format.

How Industries Using JavaScript ?

Microsoft

Microsoft relies on JavaScript for a whole lot else. First off, Microsoft needs to work closely with JavaScript to built its Edge web browser. All browsers need to process and execute JavaScript efficiently, so Microsoft has developed and maintains its own JavaScript engine for Edge. Actually, there has been talk of them creating an alternate version of NodeJS with the Edge engine.

Recently, Microsoft has really embraced NodeJS. They thoroughly support Node on the Azure cloud platform. Its one of Azure’s major features, and they’ve integrated Visual Studio support for Node.

Microsoft has also developed a version of Node for Internet Of Things(IoT) applications. NodeJS is great of IoT because it’s light weight and efficient.

LinkedIn

LinkedIn relies on NodeJS for its mobile site. A few years back, LinkedIn used Rails for its mobile site. As with other other large Rails applications, it was slow, monolithic, and it scaled poorly.

LinkedIn switched over to NodeJS to solve its scaling problems. Node’s asynchronous capabilities allowed the LinkedIn mobile site to perform more quickly than before while using fewer resources. Node also made data sharing and building APIs easier for the LinkedIn developers.

PayPal

PayPal has obviously been using JavaScript on the front end of their website for a long time, but that’s only the beginning.

The online payment giant was one of the earliest adopters of NodeJS. During an overhaul of their account overview page, they decided to try building the page in Node at the same time as their usual Java development. The NodeJS version worked out so well, that they chose to use it in production and build all client-facing applications in Node going forward. That means that most of what you see in your account is running on Node.

PayPal even went as far as to create and maintain their own version of Express, called KrakenJS. It’s pretty obvious that they like JavaScript over at PayPal.

Netflix

Like PayPal, Netflix started out using Java for just about everything. They too ran into problems with Java’s size and the time it required to develop.

Over time, Netflix moved away from its more traditional structure into the cloud and started to introduce NodeJS. With Node, Netflix was able to break down pieces of their user interface into individual services. This more distributed approach was able to speed things up an alleviate stress on their servers. Today, a large portion of Netflix’s interface is running on Node.

Groupon

Groupon used to be infamously slow. Why? They were powered by Ruby on Rails. That’s the same framework that brought you the Twitter fail whale.

Groupon was all one gigantic Ruby on Rails application. Thanks to difficulties in speed and maintainability, they decided to change over to NodeJS. Node allowed Groupon to rebuild their entire US website by breaking down everything into individual NodeJS web applications. Now, Groupon is made up of over 20 Node applications, and it moves much faster as a whole.

Groupon is currently moving all of their international sites to NodeJS and has joined the NodeJS Foundation. It’s pretty clear that they are happy with their change.

Uber

Uber needs to handle loads of data in real time. They have millions of requests coming in continuously, and that’s not just hits on a page. Uber needs to track driver locations, rider locations, and incoming ride requests. It has to seamlessly sort that data and match riders as fast as possible.

All of that plays to NodeJS’s and JavaScript’s strengths. Node is designed to handle requests and hand off data quickly. It’s asynchronous capabilities are a huge part of that. Node is central to Uber’s user facing stack for just that reason.

Facebook

You’re probably aware that Facebook uses JavaScript. It’s kind of hard to miss. What’s probably not as obvious is exactly how much JavaScript goes into making Facebook and how much Facebook is involved in JavaScript development.

Try disabling JavaScript in your web browser and going to Facebook. The website will actually stop you from logging in because it won’t work without JavaScript.

You may have noticed the way that Facebook loads. Each piece of the page is separate. Facebook has invented its own way of breaking down and delivering sections of JavaScript separately. In an odd way, each section of your Facebook page is a collection of independent JavaScript applications.

It doesn’t stop there. Facebook created React, one of the most popular front end frameworks. Facebook uses React on Facebook.com as well as Instagram and WhatsApp.

Google

How doesn’t Google use JavaScript? Seriously, it’s everywhere. Google’s search results that spring up as your typing get there with JavaScript. The Gmail web client is powered by JavaScript. Google Docs? Yeah, that’s JavaScript too.

Google develops and usually open sources it’s own JavaScript tools. The most obvious example is AngularJS. Angular is used most prominently in Google’s DoubleClick advertising platform, but it’s also one of the most popular front end frameworks available. It’s even part of the MEAN stack.

Google’s more intensive services, like Google Docs, use Closure Tools. This set of tools compiles JavaScript into a lower-level faster form more suited for rich and highly responsive web applications.

There’s another big point to touch on. Google developed Chrome. Chrome, being a web browser, needed a JavaScript engine, so Google also made V8. V8 not only powers Chrome, it’s at the heart of NodeJS. So, without Google, there would be no Node.